This complete upper receiver features the same tried-and-true construction and aesthetics as our M4E1 Threaded Upper Receivers, without provisions for a forward assist. The included ATLAS R-ONE Handguard is designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Our proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards.
- M4E1 Threaded Upper Receiver, No Forward Assist
- 15" ATLAS R-ONE Handguard
- 16" 5.56 CMV Barrel
- Low Profile Gas Block and Mid-Length Gas Tube
- Port Door Assembly
- A2 Flash Hider
This complete upper receiver does not include BCG or Charging Handle.